A lot of artists launch their lead 2-3 months in advance to the album. Although I want her to launch the lead only a month and a half in advance. Its not unheard of to launch 3 months in advance.
3 months is fine for a gap too. The problem with a gap that length for Born This Way was over-promotion and the fact she released a risky single pretty close to album release. She'll be fine with a release gap of 3 months and you know it's gonna happen.